KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use __simulateChange method in ng-mocks

Best JavaScript code snippet using ng-mocks

time-picker-control.component.spec.ts

Source:time-picker-control.component.spec.ts

...52        const {fixture, component} = setup()53        const changeSpy = jest.fn()54        component.registerOnChange(changeSpy)55        const matSelect = getSelect(fixture)56        matSelect.__simulateChange('12:00:00Z')57        expect(changeSpy).toHaveBeenCalledWith('12:00:00Z')58        expect(changeSpy).toHaveBeenCalledTimes(1)59        component.onDestroy.ngOnDestroy()60        matSelect.__simulateChange('14:00:00Z')61        expect(changeSpy).toHaveBeenCalledTimes(1)62      })63    })64    describe('.registerOnTouched', () => {65      it('registers change events to the select form control value changes, and unsubscribes when destroyed', () => {66        const {fixture, component} = setup()67        const touchedSpy = jest.fn()68        component.registerOnTouched(touchedSpy)69        const matSelect = getSelect(fixture)70        matSelect.__simulateChange('12:00:00Z')71        expect(touchedSpy).toHaveBeenCalledTimes(1)72        component.onDestroy.ngOnDestroy()73        matSelect.__simulateChange('14:00:00Z')74        expect(touchedSpy).toHaveBeenCalledTimes(1)75      })76    })77    describe('.setDisabledState', () => {78      it('disables the inner form control, does not emit status changes', () => {79        const {component} = setup()80        let statusChange = null81        const sub = component.control.statusChanges82          .subscribe((v) => statusChange = v)83        component.setDisabledState(true)84        expect(component.control.disabled).toBeTruthy()85        component.setDisabledState(false)86        expect(component.control.disabled).toBeFalsy()87        expect(statusChange).toBe(null)...

mock-control-value-accessor.ts

Source:mock-control-value-accessor.ts

...10  /**11   * @deprecated use isMockControlValueAccessor instead (removing in A13)12   * @see https://ng-mocks.sudo.eu/api/helpers/isMockControlValueAccessor13   */14  public __simulateChange(value: any): void;15  // istanbul ignore next16  public __simulateChange() {17    // nothing to do.18  }19  // istanbul ignore next20  /**21   * @deprecated use isMockControlValueAccessor instead (removing in A13)22   * @see https://ng-mocks.sudo.eu/api/helpers/isMockControlValueAccessor23   */24  public __simulateTouch() {25    // nothing to do.26  }27  // istanbul ignore next28  /**29   * @deprecated use isMockValidator instead (removing in A13)30   * @see https://ng-mocks.sudo.eu/api/helpers/isMockValidator31   */32  public __simulateValidatorChange() {33    // nothing to do.34  }35}36/**37 * MockControlValueAccessor exposes access to a mock ControlValueAccessor.38 * It should be used in a combination with isMockControlValueAccessor.39 *40 * @see https://ng-mocks.sudo.eu/api/helpers/isMockControlValueAccessor41 */42export interface MockControlValueAccessor {43  /**44   * It simulates an external change of the value.45   * Please consider usage of ngMocks.change().46   *47   * @see https://ng-mocks.sudo.eu/extra/mock-form-controls48   * @see https://ng-mocks.sudo.eu/api/ngMocks/change49   */50  __simulateChange(value: any): void;51  /**52   * It simulates an external touch.53   * Please consider usage of ngMocks.touch().54   *55   * @see https://ng-mocks.sudo.eu/extra/mock-form-controls56   * @see https://ng-mocks.sudo.eu/api/ngMocks/touch57   */58  __simulateTouch(): void;59}60/**61 * MockValidator exposes access to a mock Validator.62 * It should be used in a combination with isMockValidator.63 *64 * @see https://ng-mocks.sudo.eu/api/helpers/isMockValidator...

Using AI Code Generation

1import { __simulateChange } from 'ng-mocks';2describe('TestComponent', () => {3  let component: TestComponent;4  let fixture: ComponentFixture<TestComponent>;5  beforeEach(async(() => {6    TestBed.configureTestingModule({7      imports: [FormsModule]8    }).compileComponents();9  }));10  beforeEach(() => {11    fixture = TestBed.createComponent(TestComponent);12    component = fixture.componentInstance;13    fixture.detectChanges();14  });15  it('should test input', () => {16    const input = fixture.debugElement.query(By.css('input'));17    __simulateChange(input.nativeElement, 'test');18    fixture.detectChanges();19    expect(component.test).toEqual('test');20  });21});22import { Component, OnInit } from '@angular/core';23@Component({24})25export class TestComponent implements OnInit {26  test: string;27  constructor() {}28  ngOnInit() {}29}30<input type="text" [(ngModel)]="test" />

Using AI Code Generation

1import { __simulateChange } from 'ng-mocks';2import { ComponentFixture, TestBed } from '@angular/core/testing';3import { AppComponent } from './app.component';4import { By } from '@angular/platform-browser';5describe('AppComponent', () => {6  let fixture: ComponentFixture<AppComponent>;7  let component: AppComponent;8  beforeEach(() => {9    TestBed.configureTestingModule({10    });11    fixture = TestBed.createComponent(AppComponent);12    component = fixture.componentInstance;13  });14  it('should update value', () => {15    const input = fixture.debugElement.query(By.css('input'));16    __simulateChange(input, 'test');17    expect(component.value).toEqual('test');18  });19});

Using AI Code Generation

1import { __simulateChange } from 'ng-mocks';2describe('MyComponent', () => {3  let component: MyComponent;4  let fixture: ComponentFixture<MyComponent>;5  beforeEach(async(() => {6    TestBed.configureTestingModule({7      imports: [FormsModule],8    }).compileComponents();9  }));10  beforeEach(() => {11    fixture = TestBed.createComponent(MyComponent);12    component = fixture.componentInstance;13    fixture.detectChanges();14  });15  it('should create', () => {16    expect(component).toBeTruthy();17  });18  it('should set the value of the input', () => {19    const input = fixture.debugElement.query(By.css('input'));20    __simulateChange(input, 'newValue');21    expect(component.myValue).toEqual('newValue');22  });23});24import { Component, OnInit } from '@angular/core';25@Component({26    <input type="text" [(ngModel)]="myValue" />27})28export class MyComponent implements OnInit {29  myValue = '';30  constructor() {}31  ngOnInit(): void {}32}

Using AI Code Generation

1import { __simulateChange } from 'ng-mocks';2describe('AppComponent', () => {3  let component: AppComponent;4  let fixture: ComponentFixture<AppComponent>;5  beforeEach(async(() => {6    TestBed.configureTestingModule({7      imports: [FormsModule]8    })9    .compileComponents();10  }));11  beforeEach(() => {12    fixture = TestBed.createComponent(AppComponent);13    component = fixture.componentInstance;14    fixture.detectChanges();15  });16  it('should create', () => {17    expect(component).toBeTruthy();18  });19  it('should have a button', () => {20    const button = fixture.debugElement.query(By.css('button'));21    expect(button).toBeTruthy();22  });23  it('should have a input', () => {24    const input = fixture.debugElement.query(By.css('input'));25    expect(input).toBeTruthy();26  });27  it('should have a input with value', () => {28    const input = fixture.debugElement.query(By.css('input'));29    expect(input.nativeElement.value).toBe('1');30  });31  it('should have a input with value 2', () => {32    const input = fixture.debugElement.query(By.css('input'));33    __simulateChange(input.nativeElement, '2');34    fixture.detectChanges();35    expect(input.nativeElement.value).toBe('2');36  });37});

Using AI Code Generation

1  const element = fixture.debugElement.query(By.css('input'));2  element.triggerEventHandler('change', { target: { value: 'test' } });3  fixture.detectChanges();4  const element = fixture.debugElement.query(By.css('input'));5  element.triggerEventHandler('change', { target: { value: 'test' } });6  fixture.detectChanges();7  const element = fixture.debugElement.query(By.css('input'));8  element.triggerEventHandler('change', { target: { value: 'test' } });9  fixture.detectChanges();10  const element = fixture.debugElement.query(By.css('input'));11  element.triggerEventHandler('change', { target: { value: 'test' } });12  fixture.detectChanges();13  const element = fixture.debugElement.query(By.css('input'));14  element.triggerEventHandler('change', { target: { value: 'test' } });15  fixture.detectChanges();16  const element = fixture.debugElement.query(By.css('input'));17  element.triggerEventHandler('change', { target: { value: 'test' } });18  fixture.detectChanges();19  const element = fixture.debugElement.query(By.css('input'));20  element.triggerEventHandler('change', { target: { value: 'test' } });21  fixture.detectChanges();22  const element = fixture.debugElement.query(By.css('input'));23  element.triggerEventHandler('change', { target: { value: 'test' } });24  fixture.detectChanges();25  const element = fixture.debugElement.query(By.css('input'));26  element.triggerEventHandler('change', { target: { value: 'test' } });27  fixture.detectChanges();

Using AI Code Generation

1const element = fixture.debugElement.query(By.css('input'));2const input = element.nativeElement;3input.value = 'test';4input.dispatchEvent(new Event('input'));5export class MockNgModel {6    public value: any;7    public control: any;8    public __simulateChange(value: any) {9        this.value = value;10    }11}12export function MockNgModelFactory() {13    return new MockNgModel();14}15describe('MockNgModelFactory', () => {16    beforeEach(() => {17        TestBed.configureTestingModule({18            imports: [FormsModule],19                { provide: NgModel, useFactory: MockNgModelFactory },20        });21        fixture = TestBed.createComponent(TestComponent);22        component = fixture.componentInstance;23        fixture.detectChanges();24    });25    it('should set value from outside', () => {26        component.testValue = 'test';27        fixture.detectChanges();28        expect(component.testValue).toEqual('test');29    });30});

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.